On 21 June 2012 19:42, David Demelier <demelier.david_at_gmail.com> wrote: > On 21/06/2012 14:55, Sergey Kandaurov wrote: >> >> On 21 June 2012 16:38, David Demelier<demelier.david_at_gmail.com> wrote: >>> >>> Hello, >>> >>> While reading the manpage of mbstowcs I noticed an error in the RETURN >>> VALUES : >>> >>> The mbstowcs() function returns the number of wide characters >>> converted, >>> not counting any terminating null wide character, or -1 if an invalid >>> multibyte character was encountered. >>> >>> Since size_t is unsigned, it can't returns -1. >> >> >> It returns (size_t)(-1). >> I don't know how is it correct, but this conforms to C spec. >> > > Mm, if I understand well, since it is cast to size_t, I think the return > value will be SIZE_MAX - 1 then, right? No, just SIZE_MAX. There is also remarkable SIZE_T_MAX. It came with 4.4BSD Lite sources under !defined(_POSIX_SOURCE). Later it was converted to be under __POSIX_VISIBLE >= 200112 || __XSI_VISIBLE. I hasn't found anything relative in any POSIX editions. I think this was a typo/misunderstanding. Other BSD has put this macro under its corresponding if XBSD_VISIBLE. Therefore I think SIZE_T_MAX should be avoided. -- wbr, pluknetReceived on Thu Jun 21 2012 - 15:28:09 UTC
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